#include "stdio.h"
#include "unistd.h"
#include "sys/types.h"
#include "sys/ioctl.h"
#include "stdlib.h"
#include "termios.h"
#include "sys/stat.h"
#include "fcntl.h"
#include "sys/time.h"

int main(void)
{
	
	int on=1;
	int led;
	int fd;
	fd=open("/dev/leds",0);
	if(fd<0)
	{
		perror("open device leds");
		exit(1);
	}
	printf("leds test show,press ctrl+c to exit \n");
	while(1)
	{
		for(led=0;led<4;led++)
		{
			ioctl(fd,on,led);
			usleep(50000);
		}
		on=!on;
	}
	close(fd);
	return 0;
}
